html, body {
	height: 100%;
	background-color:#ccc;
}
body {
	color: #fff;
	background:url(../imgs/cover_bg.jpg) no-repeat center;
	text-align: center;
	text-shadow: 0 1px 3px rgba(0,0,0,.5);
	font-family:'微软雅黑';
}

.cover-container {
	margin-right: auto;
	margin-left: auto;
	vertical-align:middle;
}

/* Header */
.masthead-brand {
	margin-top: 10px;
	margin-bottom: 10px;
}

.masthead-nav > li {
	display: inline-block;
}
.masthead-nav > li + li {
	margin-left: 20px;
}
.masthead-nav > li > a {
	padding-right: 0;
	padding-left: 0;
	font-size: 16px;
	font-weight: bold;
	color: #fff; /* IE8 proofing */
	color: rgba(255,255,255,.75);
	border-bottom: 2px solid transparent;
}
.masthead-nav > li > a:hover,
.masthead-nav > li > a:focus {
	background-color: transparent;
	border-bottom-color: #a9a9a9;
	border-bottom-color: rgba(255,255,255,.25);
}
.masthead-nav > .active > a,
.masthead-nav > .active > a:hover,
.masthead-nav > .active > a:focus {
	color: #fff;
	border-bottom-color: #fff;
}

@media (min-width: 768px) {
	.masthead {
    	position: fixed;
    	top: 0;
  	}
	.masthead, .cover-container{
		width:100%;
	}
	.masthead-brand {
    	float: left;
  	}
  	.masthead-nav {
    	float: right;
  	}
}

@media (min-width: 992px) {
	.masthead, .cover-container {
		width: 700px;
	}
}
 

/* signin */
.form-signin {
	max-width:330px;
	padding:15px;
	margin:0 auto;
	margin-top:150px;
}
.form-signin .form-signin-heading, .form-signin .checkbox {
	margin-bottom: 10px;
}
.form-signin .checkbox {
	font-weight: normal;
}
.form-signin .form-control {
	position: relative;
	height: auto;
	-webkit-box-sizing: border-box;
	   -moz-box-sizing: border-box;
			box-sizing: border-box;
	padding: 10px;
	font-size: 16px;
}
.form-signin .form-control:focus {
	z-index: 2;
}
.form-signin input {
	background:rgba(255,255,255,0.7);
	border-color:#ccc;	
}
.form-signin input[type="email"] {
	margin-bottom: -1px;
	border-bottom-right-radius: 0;
	border-bottom-left-radius: 0;
}
.form-signin input[type="password"] {
	margin-bottom: 10px;
	border-top-left-radius: 0;
	border-top-right-radius: 0;
}
.container a{ color:#fff; }
.container .link{
	max-width:330px;
	margin:0 auto;
	margin-top:10px;
	padding:0 30px;
}